ondoy,
That's a first, mixing synth and mineral, but not sure it will work as intended. The synth side may be too little to make a difference. Think the "synth blends" are basically mineral base oils with synth additives so i'd prefer just a plain mineral oil changed often if a full synth is not an option.

roydok,
The Top1 synth is really a blend- says so on the can's fine print. Kinda misleading but the price gives it away.